What does c5 and c6 degenerative disease with associated hypertrophy changes and reversal of cervical lordosis No significant subluxation facet arthritis mean when stated on a cat scan?

You have changes associated with age and wear and tear between the fifth and sixth neckbones on the flat, round part. This Arthritis has led to some bony overgrowth, and your neck has a different curve than normal (perhaps because of spasm). There isn't anyplace where one neckbone has slipped off another, and there are no arthritic changes in the right and left parts of the neckbones that protrude (i.e. the facets).

None of that tells you anything about prognosis and treatment. These kinds of changes are found in both patients with symptoms, and patients without symptoms. You can only make sense of this kind of report in conjunction with a physical exam and history. Talk with your health care provider about next steps.