Select Last X Used Cells In Column

I would like to select the last few cells in a column, however the number of rows is not fixed, it changes. This can only select the fifth last cell:

Sheets("ABC").Range( 'A1:A150').End(xlDown).Offset(-5, 0).Select

Ultimately, i want to select the 5 cells from the fifth last to the last:
from this: Sheets("ABC").Range( 'A1:A150').End(xlDown).Offset(-5, 0).Select

to this: Sheets("ABC").Range( 'A1:A150').End(xlDown).Offset(0, 0).Select

If possible, with the cells selected, can i do something similar to this:

Range("B62:B67").Select
Selection.AutoFill Destination:=Range("B62:B114"), Type:=xlFillDefault
Range("B62:B114").Select

The underlined parts is the part which make me headache. How do i solve this?