The height does not influence the match ratings, but only the speed of training. Tall players will train slower in jump shot, jump range, handling and driving (i think), short players in blocking, rebounding, etc...
He is already a good PG, but he is so complete that with little effort he could be a very good SF (slightly too short, but still ok I think). I would suggest you to train him in Inside shot and driving to start with.
I'll try to buy a player like that in a few days... but a bit older (cheaper), not to be trained.
Good luck! :)