Respected Brother/Sister in Islam
As Salaamu Alaykum wa Rahmatullahi Wa Barakaatuh
Haamidaw wa Musalliyaa
Your query below refers;
One does not have to remove the hair directly below the naval. Rather, the pubic hair on and around the private parts is to be removed. This could be determined by removing the hair upto approximately four fingers above the private part. It is also important to remove the hair between the anus and the front private part.
And Allah Ta'ala Knows Best
Shafiq Jakhura (Mufti)