Not a centimeter taller. I've seen him in person dozens of times and it's amazing. He is the most physically unimposing onetime terror of all time. It looks like you could flick him away with a little finger or two. Not even that dense, in the body, I mean.
I'll never forget the first time I saw him, in the Sands casino, late '80s. He walked by with an entourage while I was talking to an English couple. The husband recognized him first and said to his wife, "Why lookee there, it's Mike Tyson!"
If I (hopefully) live to 100 I'll never forget the wife's response, in phenomenal British accent: "Why, he can't be more than 5 feet tall."