Question: The 1984 Troy State Trojans football team represented Troy State University during the 1984 NCAA Division II football season, the 1984 team was led by which former American football coach?

Context paragraphs:
2016 Troy Trojans football team: The 2016 Troy Trojans football team represented Troy University in the 2016 NCAA Division I FBS football season.  They were led by second-year head coach Neal Brown and played their home games at Veterans Memorial Stadium in Troy, Alabama.  The Trojans were members of the Sun Belt Conference.  They finished the season 10–3, 6–2 in Sun Belt play to finish in a two-way tie for third place.  They were invited to the Dollar General Bowl where they defeated Ohio.  This was the first 10-win season ever for Troy since joining the FBS in 2001.  It was also the first season that Troy had received a Top 25 ranking since joining the FBS in 2001.

1987 NCAA Division II football season: The 1987 NCAA Division II football season, part of college football in the United States organized by the National Collegiate Athletic Association at the Division II level, began in August 1987, and concluded with the NCAA Division II Football Championship on December 12, 1987, at Braly Municipal Stadium in Florence, Alabama, hosted by the University of North Alabama.  The Troy State Trojans defeated the Portland State Vikings, 31–17, to win their second Division II national title.

Chan Gailey: Thomas Chandler Gailey Jr. (born January 5, 1952) is a former American football coach.  Gailey has served as the head coach of the Dallas Cowboys, Georgia Tech Yellow Jackets, and Buffalo Bills.

1984 Troy State Trojans football team: The 1984 Troy State Trojans football team represented Troy State University during the 1984 NCAA Division II football season, and completed the 64th season of Trojan football.  The Trojans played their home games in at Veterans Memorial Stadium in Troy, Alabama.  The 1984 team came off an 7–4 record from the previous season.  The 1984 team was led by coach Chan Gailey.  The team finished the regular season with a 9–1 record and made the NCAA Division II playoffs.  The Trojans defeated the North Dakota State Bison 18–17 in the National Championship Game en route to the program's first NCAA Division II Football Championship and second overall national championship.

1987 Troy State Trojans football team: The 1987 Troy State Trojans football team represented Troy State University during the 1987 NCAA Division II football season, and completed the 67th season of Trojan football.  The Trojans played their home games in at Veterans Memorial Stadium in Troy, Alabama.  The 1987 team came off an 10–3 record from the previous season.  The 1987 team was led by coach Rick Rhoades.  The team finished the regular season with a 9–1–1 record and made the NCAA Division II playoffs.  The Trojans defeated the Portland State Vikings 31–17 in the National Championship Game en route to the program's second NCAA Division II Football Championship and third overall national championship.

1983 North Dakota State Bison football team: The 1983 North Dakota State football team represented North Dakota State University during the 1983 NCAA Division II football season, and completed the 87th season of Bison football.  The Bison played their home games at Dacotah Field in Fargo, North Dakota.  The 1983 team came off an 12–1 record from the previous season.  The 1983 team was led by coach Don Morton.  The team finished the regular season with a 9–1 record and made the NCAA Division II playoffs.  The Bison defeated the Central State Marauders 41–21 in the National Championship Game en route to the program's first NCAA Division II Football Championship.

1988 North Dakota State Bison football team: The 1988 North Dakota State football team represented North Dakota State University during the 1986 NCAA Division II football season, and completed the 92nd season of Bison football.  The Bison played their home games at Dacotah Field in Fargo, North Dakota.  The 1988 team came off an 6–4 record from the previous season.  The team was led by coach Rocky Hager.  The team finished the regular season with an undefeated 10–0 record and made the NCAA Division II playoffs.  The Bison defeated the Portland State Vikings 35–21 in the National Championship Game en route to the program's fourth NCAA Division II Football Championship.

1973 Louisiana Tech Bulldogs football team: The 1973 Louisiana Tech Bulldogs football team represented Louisiana Tech University during the 1973 NCAA Division II football season, and completed the 71st season of Bulldogs football and their first as members of the reorganized NCAA Division II.  The Bulldogs played their home games in at Joe Aillet Stadium in Ruston, Louisiana.  The 1973 team came off an undefeated 12–0 record, and a College Division National Championship from the prior season.  The 1973 team was led by coach Maxie Lambright.  The team finished the regular season with a 9–1 record and made the inaugural NCAA Division II playoffs.  They made the first NCAA Division II Football Championship Game with a 38–34 win over Boise State in the Pioneer Bowl.  The Bulldogs defeated the Western Kentucky Hilltoppers 34–0 in the National Championship Game.

2004 Troy Trojans football team: The 2004 Troy Trojans football team represented Troy University in the 2004 NCAA Division I FBS football season.  The Trojans played their home games at Movie Gallery Stadium in Troy, Alabama and competed in the Sun Belt Conference.  The 2004 season was Troy's first season as a member of the Sun Belt Conference.  Troy also made their first ever appearance in a Division 1-A bowl game during this season since the program transitioned to 1-A just three years prior in 2001.  The Trojans lost 21-34 to Northern Illinois in the Silicon Valley Bowl.

1973 Western Kentucky Hilltoppers football team: The 1973 Western Kentucky football team represented Western Kentucky University during the 1973 NCAA Division II football season, and completed the 56th season of Hilltopper football and their first as members of the reorganized NCAA Division II.  The Hilltoppers played their home games in at L.T. Smith Stadium in Bowling Green, Kentucky.  The 1973 team came off a 8–2 record from the prior season.  The 1973 team was led by coach Jimmy Feix.  The team finished the regular season with an undefeated 10–0 record and made the inaugural NCAA Division II playoffs.  They made the first NCAA Division II Football Championship Game with a 28–20 win over Grambling State in the Grantland Rice Bowl.  However, the Hilltoppers lost to Louisiana Tech 34–0.

Supporting paragraphs: 1984 Troy State Trojans football team Chan Gailey
Answer: Chan Gailey