To me it seems that bees usually leave you alone while they go about their business. Having said that 2 weeks ago I was stung on the neck while walking the back lawn where no bees are housed. It was a painful shock.
Do other folks in your neighbourhood keep bees? If so you could explain to him that others also keep bees and that they have a large foraging area. If you were to move your bees he would still be at risk of being stung. I would let him know you are sorry he was stung, that you really have no way of knowing if it was one of your bees or not. Given he is not stung on a regular basis you could put forward the argument that it may well have been an interloper bee as yours have been there a while with no prior issue.
Do other folks in your neighbourhood keep bees? If so you could explain to him that others also keep bees and that they have a large foraging area. If you were to move your bees he would still be at risk of being stung. I would let him know you are sorry he was stung, that you really have no way of knowing if it was one of your bees or not. Given he is not stung on a regular basis you could put forward the argument that it may well have been an interloper bee as yours have been there a while with no prior issue.