Can I use local exec to set the player's X Y Z?

[Ink. 10]

Alright. I have a character in an animation. His position is /almost/ perfect. The problem is that the object he's trying to sit on doesn't care and so he's a few feet above where his model should realistically be.

See: http://i.imgur.com/MkQbpW5.jpg

Is there anyway I can use coordinates to modify his position while he's still in the animation, so that I can have him sitting more properly? I would prefer this to be done via local exec while I'm ingame as he'll have more to do.

I've gotta do ~10 of these with varying anims. It would be soooo much easier to do if I can just tell them to move their x y or z coordinates specifically so if they are too far infront I can push them back, or too high to push them lower, so it appears they're sitting in the seat(s).