Both tires tilt out at the top, it's normal. You need to look closer.
And make sure that when you are looking at it, the axle is square to the tractor- one side higher than the other will change how it looks...
You could also park the tractor on a hard surface, and use a framing square to check how much it leans out. Then, measure the other side. You could also run to your dealership with your framing square and tape measure, and check a new tractor. Then, you will know whether you have a problem, or if it's normal.