Same happened to me when I had my clutch done. The garage fixed in in about 30 seconds when I took it back, they didn't even take the knob off. They just lifted the gaitor, loosened the nuts slightly and then got me to check it was in the position I was used to before they tightened it up again.
The guy that did it didn't pull all the way to the right when he put it in 5th/6th like I do so he didn't notice the alignment had changed very slightly.