Series.Values (Word)
Returns or sets a collection of all the values in the series.
The value of this property can be either the address of a range on the chart's worksheet or an array of constant values, but not a combination of both. See the examples for details.
With ActiveDocument.InlineShapes(1)
If .HasChart Then
.Chart.SeriesCollection(1).Values = "=Sheet1!B2:B5"
End If
End With