If it were my set-up and your loaded condition is a normal representation of your towing conditions, I would tend to leave it as-is...., even taking into consideration the CAT scale tolerance of plus/minus 40lbs.
Presently you have about a 12% (960lbs @ 7,980lbs gross) loaded tongue weight condition (which is good), but the natural tendency is to add TT cargo over time so moving towards 15% may remove a little weight from the TV's front axle. I've found that 13% to 15% to be the norm with the longer/heavier TT's.
Since you mentioned a full fresh water tank as part of your CAT scale loaded condition...., the location of the tank has a direct effect on one's loaded tongue weight. If you normally don't tow with a full fresh water tank, I would re-visit the CAT scale with an empty tank and compare your CAT weight certificates.
Just a FYI: Those that tow often with a full fresh water tank to their destination may not tow with a full fresh water tank upon returning home....., IMO it's good to know the effect on one's tongue weight for that return trip home.