This video talks about it at about the 6:26 mark:
https://www.youtube.com/watch?v=TaGtLOdGVJM
Looks like you would need to screw it clockwise to get the string to go higher.
It shouldn't take much adjustment to get rid of that buzzing. Maybe try it half of a turn at a time.
-Carl.
Carl King
Director of Content
GuitarTricks
Los Angeles, CA