That was over 34 years ago in 1988.
Today he is 84, and has starred in 95 movies in total, 69 since Rain Man was released.
In Rain Man, I think Dustin Hoffman looks:
Rain Man scores 7.6 out of 10 on The Movie Database.
Dustin Hoffman's first acting role was as 'Zoditch' in The Journey of the Fifth Horse, released in 1966 when he was 29.