the steering wheel turned a few degrees could have happened any number of ways including having an alignment performed. it is possible for a car to be aligned yet have the wheel be out of whack - one of the most common comebacks at alignment shops (been there done that). in the days before airbags in some cars it was a simple matter to just yank the wheel and put it back in place at the correct angle.
don't wait too long before you get tires and schedule an alignment. it might also be a good idea to show the old tires to whomever is going to do it for you. it may help id parts that need replacement...
1993 300e-2.8 - gone now <sigh>
"Do not adjust your mind, it's reality that's malfunctioning"