Conversation so far:
What happened in 1984?
He later joined the musical group World Class Wreckin' Cru under the independent Kru-Cut Records in 1984.
Did they record any singles or albums?
"Surgery".
Did it have any hit singles?
"Surgery.
What happened in 1985?
After brief attendance at a radio broadcasting school, he relocated to the residence of his father and residence of his grandparents before returning to his mother's house.
Did World Class Wreckin' Cru ever go on tour?
CANNOTANSWER.

Question: Why did he relocate?
Self-contained rewrite: Why did Dr. Dre relocate to the residence of his father?