Wacker Parts Lists Can A Tree Survive If Part Of It Is Cut Off With A Weed Wacker?

Can a tree survive if part of it is cut off with a weed wacker? - wacker parts lists

I have recently planted a tree high above the rain or from 3 meters. While the weeds around the fence, hit a mower hit the fence and push the tree. It has about 6 cm reduced to 8 from the top of the tree and asked me if I was killed or whether she will survive and grow. Any advice would be great.