Table:
text: 1993 PGA Championship
Missed the cut
Missed the cut
Player Country Years_won Total To_par
Bob Tway United States 1986 144 +2
Jack Nicklaus United States 1963 , 1971 , 1973 1975 , 1980 144 +2
Raymond Floyd United States 1969 , 1982 144 +2
Wayne Grady Australia 1990 145 +3
John Mahaffey United States 1978 147 +7
David Graham Australia 1979 157 +15

Question: In 1993 the PGA Championship missed the cut, how many off par did the 1978 winner have?