Would i still be allow in to Guelph university with a low english mark?

Ok so im in grade12 and i have already been accepted to Guelph University for a B.A in Geography. The acceptance letter said i only need a 70 average overall to stay in. i currently have a 77-79 average im not 100% but its high 70. Now the problem i have is i don't no if my english mark is enough to stay in. At midterm it was a 73 and now sadly it has dropped to a 68 and i still have my exam which is very hard with my teacher so im prepared to maybe drop to a 65. Now i have looked everywhere online to see if there is a requirement for your english mark, but it says nothing. As well the letter that i got in said nothing but me needing to p english there was no mark percentage. just my average needed to be a minimal of a 70 and i have at least a 77. So will my acceptance be revoked?