I have looked through the other posts on the subject and the combination of
my low skills in VB and the other solutions not exactly covering my situation
means I still need to ask for help.

Scenario:

Worksheet a = "Scorecard"
FieldName = "CustomerNumber"

Worksheet b = "Products Resume"
PivotTable = "PivotTable2"
PivotTable Page Field = "Account Number"

When CustomerNumber value on worksheet "Scorecard" is changed I need the
Pivot Table Page field "Account Number" to use this value to filter the pivot
table.

I found the below code which looks like it may be close to what I need but
my lack of VB knowledge meant I could not adapt it -

Option Explicit

Private Sub Worksheet_Change(ByVal Target As Range)
If Target.Address = Range("SelDept").Address Then
Me.PivotTables(1).PivotCache.Refresh
End If
End Sub

Help please...