The batter hits the ball over the fence and a balk was called what happens?

In Major League Baseball a Balk is a delayed dead ball. That means that if the pitcher pitches the ball after the Balk is called, the umpire waits to see what happens before calling time and enforcing the Balk. If the batter hits the ball, and reaches base safely, and all runners advance at least one base, the Balk is ignored.