230.26 Tells us the height of the point of attachment shall provide the minimum clearances as specified in 230.24.

230.24(B)(2) requires 12 feet of vertical clearance above a residential driveway.

I do not think you can expect the power company to pull the drop so tight that it has less than 6" of sag.

Also 6" of sag in the winter will be more that 6" of sag in the summer.

IMO the inspector is correct you must raise your point of attachment.

Bob Badger
Construction & Maintenance Electrician
Massachusetts