از مقادیر بزرگتر از صفر مجموعه میانگین میگیرد

Sub avg()
Dim sum As Integer
Dim num As Integer
Dim avg As Single

For j = 2 To 8400
sum = 0
num = 0
avg = 0
  For i = 68 To 75
     If Cells(i, j) > 0 Then
     sum = sum + Cells(i, j)
     num = num + 1
     End If
     If num < 1 Then
     Sheets("avg-day").Cells(12, j) = 0
     Else
     Sheets("avg-day").Cells(12, j) = sum / num
     End If
  Next i
Next j
End Sub