Not in full. There are two cases. It is set up as before *only if the cue ball rolls over the spot where the moved ball was* (bold red below). Otherwise, it is just replaced "and play continues" (bold below). So if it was clear the cue ball would have missed the 6, then the 6 is replaced, and the incoming player either (I'm not sure here) gets BIH for a foul or plays it as it sits. My interpretation would be incoming player gets BIH.
From
http://www.billiards.com/article/bca-general-rules-of-pocket-billiards-p2
30. BALLS MOVING SPONTANEOUSLY. If a ball shifts, settles, turns or otherwise moves "by itself," the ball shall remain in the position it assumed and play continues.
A hanging ball that falls into a pocket "by itself" after being motionless for 5 seconds or longer shall be replaced as closely as possible to its position prior to falling, and play shall continue. If an object ball drops into a pocket "by itself" as a player shoots at it, so that the cue ball passes over the spot the ball had been on, unable to hit it, the cue ball and object ball are to be replaced to their positions prior to the stroke, and the player may shoot again. Any other object balls disturbed on the stroke are also to be replaced to their original positions before the shooter replays.