76 miles in itself should be fine, but doesn't leave you much cushion for running errands after work. Have you checked PlugShare to see if there are any places to charge at/near your workplace in case you need it?
Is your freeway driving often in rush hour traffic, or at highway speeds? EVs lose efficiency as speeds increase, so your range at a 70 mph average will be shorter than your range at a 40 mph average, for example.