You are confusing the range as a Range object with its Address property.
Method 1:
Sub movedata()
Call select_data(Range("B6:B12").address)
End Sub
Function select_data(C As string)
with Worksheets("sheet1")
.Range("I6:I16") = .Range(C).Value
end with
End Function
Method 2:
Sub movedata()
Call select_data(Worksheets("sheet1").Range("B6:B12"))
End Sub
Function select_data(C As range)
C.parent.Range("I6").resize(C.rows.count, C.columns.count) = C.Value
End Function
fwiw, there is going to be some difficulties stuffing B6:B12's values into I6:I16's cells. There seem to be 4 missing values.