I don't know about other brewing software, or even if you use any, but on the recipe Design tab in Beersmith, there is a box next to the Equipment selection where you can enter your efficiency and it will adjust the OG, color and ABV values in the Style Guide Comparison section. that box is defaulted to 72%; just change it to 85% and you'll see the 3 sliders shift to the right.
decrease the amount of grains to match it with your previous numbers.
"Beer. Good." - Words of House Grog
drinking: Otto M. Gourd Pumpkin Barleywine, Jewel Thieves Apple Wine, Fresh Squee Zed IPA - bottle conditioning: LoCo Foot Barleywine - secondary: Basque cider - fermenting: apple wine, Skeeter Pee, Schwarzbier - on deck: Grodziskie