TPM's higher than Avatar, lower than Titanic (Avatar I have estimated at 75-76M tickets, BOM's reports at the time suggest the same). TPM is at ~85.
I dug up the data last week to recalculate (I had it at 75-77M before that).
http://forums.boxofficetheory.com/topic/20748-star-wars-the-force-awakens-opening-weekend-actuals-in-1st-post-247966675-the-force-awoke-and-its-not-sleeping-anytime-soon-119-68-60/?page=271#comment-2314266
$1.2-1.3B right now, challenging Titanic's attendance. I expect it to have strong legs after the holidays; its performance has been exceptional thus far, I see no reason for it to fall off beyond what you'd expect once normal days kick back in (weaker Mon-Thurs, strong weekend holds).