Button Resteal: Missed Opportunity?

[bruce]

Legends $5000 buyin day 2. LAG openraises UTG for 3x big blind.
He has a big stack. Next two players call. Callers are
passive with medium large stack. I am on button with 12x
big blind. Is this a good time for me to push (being there it felt perhaps right with the table dynamics)? Three players in pot have demonstrated ability to fold to reraises
on previous hands. Do I have to be in the big blind to
attempt a steal like this? My hand for the purpose of this
discussion is 72o (actually it was 93o).

Bruce