Manipulating Extend Data

Is there a way to manipulate the Extend Data feature? For example, say I have formulas in E5, F5, and G5 and I want to reference B11, B7, and B3. Do the same thing for H5, I5, and J5, referencing C11, C7, and C3. This will repeat a lot of times. When I try to use the extend feature, the fourth cell(H5) references E11 instead of C11.

I have enclosed my actual issue. Thank You