But he has done this before and called me back after bluffing and lying.

He wasn't bluffing because he gave me my SSN and DOB over the phone.What should I do in this case and future to prevent Identity theft

It's not lying, it's bluffing... much like playing poker.

they all think i was bluffing.

The tenant is most likely bluffing and like other posters have mentioned, it's unlikely that they would have much chance of winning based on what you have told us.  

If he's willing to threaten moving out and he was just bluffing well to bad in the grown up world you get called out on bluffs especially when you can't back them up.

I was shocked that they didn't have anything at all boxed up, as if I was bluffing when I told her that the eviction was set for today. 

Bottom line, agents are out there bluffing.

all this puffing and bluffing about specific performance on this site is just by rookies or those who just know enough to be dangerous they have no clue about reality. 

The bluff is this in some form: "I have been getting a bunch a calls on this" or "I can put this back on the market and ill have a couple new offers the next day" or my personal favorite "There's a guy/company in California that has offered way above asking price for this" Now this is not always a bluff but in my experience its usually bluffing 90% of the time.