Code in most areas calls for garage receptacles to be 48" or thereabouts from the floor, this is to keep the receptacles above any accumulating flammable vapors. Keeping receptacles high on the walls in a workshop environment is better IMO, no stooping to plug stuff in, cords are kept more off the floor, outlets aren't blocked by items leaning against or stored along walls. If a workbench is placed against the wall, the outlets are in a good position above the bench.
I have overhead cord reels and raceways in my garage and basement workshop to plug stationary machines and cord reels into. This keeps cords completely off the floor and away from getting snagged on workpieces and machines.