[Irishman07]

Theres really no reason to do it with complete trash. You can do it with hands that will at least flop something some of the time and still be fine. Even 96s is so much better than 84o, and the times you are called the added equity you'll have over 84o will add up.

I just did a rough pokerstove for a villain with a loose calling range of your 3bet - and 96s had roughly a 7% increase in equity over 84o. This may not seem like a ton, but it's a decent clip over the long run.