Post-Sound Mixer for Feature - pay-it-forward question (Los Angeles)

Dear Post-Sound Mixer, We have a very small theater release of an important yet small indie faith film. We're making the DCP now. We have a major question to ask any post-production sound mixer and we promise to pay-it-forward: We had to lower the theater volume at our screening to 4.9 as the sound mix was too loud or hot. Usually the theater has it set at 7. Would the band-aid way on Adobe Premiere be to lower the entire master by -6 db? Thoughts? Thanks to anyone who can help. We promise again to pay-it-forward. “Be nice to people... maybe it'll be unappreciated, unreciprocated, or ignored, but do it anyway. We rise by lifting others.” - Abe Lincoln