NL100: 67s from BB, interesting flop

[pokergrader]

Reads: UTG has slightly laggy stats of 35/25/3, hasn't been involved in any interesting pots, just picking up some small ones.

UTG ($105.45)
MP ($91)
Button ($59.55)
SB ($97.50)
Hero ($153.60)

Preflop: Hero is BB with 7[img]/images/graemlins/heart.gif[/img], 6[img]/images/graemlins/heart.gif[/img].
<font color="#CC3333">UTG raises to $4</font>, <font color="#666666">1 fold</font>, Button calls $4, <font color="#666666">1 fold</font>, Hero calls $3.

Flop: ($12.50) 6[img]/images/graemlins/club.gif[/img], 9[img]/images/graemlins/spade.gif[/img], 8[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, <font color="red">UTG bets $7</font>, <font color="gray">Button folds</font>, Hero ????

What do I do and what is my plan for the rest of the hand?