How do I properly secure electrical conduit in a garage?

I failed an electrical inspection (State: NJ) the other day. The inspector said that because my shed could accommodate a car, the electrical conduit had to be secured better in case a car hit it.

The conduit comes out of the concrete, bends, and is secured to the studs for a short run before turning up and going into the box. I've been unable to find a good description of how to do what I need to do.

For what it's worth; the conduit was installed by a professional electrician, not me – but I'd just assume fix it myself to get it taken care of quickly.