I got an email stating that I failed to meet one for the conditions for my offer to Humanities. My top 6 including English was over 80% but my English mark was my lowest. Is there a requirement average for English or do I need to have a 75 overall?

When I applied for Humanities 4 years ago, there was no indication that you need to have a certain mark for English. All it was is that you need at least 75-79% overall average on your 4M or 4U courses and English has to be one of them.