I don't know where to go to take tailoring past 350 the one in thrallmar only takes me to 350... PLEASE HELP (H)

u will have to pick a special cloth to train in.
primal mooncloth, shadowcloth, or spellcloth

for these u train in shrattah city but u have to complete quest to be able to make

Do you have to be Lvl 68 to get the quest for a special?

No. You have to be 60.