The guard said to go to the Silken Fields and find the guy. I found the guy, but he won't let me train anything. Just some RP text comes up.
It's easiest to train all your professions in Orgimaar before you head over to Pandaria. You do need to be in the silken fields to do your daily cloth transmute.
You're not Level 90 yet. They didn't want people to summon 85s to the Vale and not quest through.
As far as I know, there's nothing that that guy actually teaches you. The trainers in the major towns will sell you plans that will get you up to or close to the max. From there, you can buy PVP and Reputation plans in the major Pandaria city from the tailoring trainer and the reputation vendors.