I think the max height is 6'6", but you also have to be under a certain measurement for other things. The one that almost got me(and I'm only 6'4") was the sitting height max of 39". I had to be "more accuratly" remeasured to qualify at 38 1/2". The lousy thing is that it's not that you won't be able to fit in an F-18 or F-14 but rather you can't fit in the trainer.
Good Luck