Need help in weight loss

First about me I started at 87 and dropped till 74 in like 8 months smoothly (BF from 40 to 25) now due to few personal reasons I again back to 84 ! (One good thing continued with gym and good diet not clean but way less junk than before) visibly gained muscle mass (really good improvement in that area) but belly fat is still there like an apple.

Now need a few suggestions;

1. My diet is shorted because i done hell lot of reasearch about it. Just want to know shall cutting calories low like 1600-1700 will help for long term (like 1-2 months or body will shoot back at me)
2. How much cardio should I target, I either do 10k steps or 1 hr incline walk at 18 incline and speed between 3-4.
3. Any solution for weight shooting up after a cheat meal or cheat day. (usually do cheat meal)
4. How to reduce that stubborn belly fat. Its really annoying. and can i go back to 75 in 3-4 months with above plan ?