How to Possible to select last item of listbox by tap on when last item stay under the application bar?

<Grid x:Name="LayoutRoot" Background="{StaticResource PhoneChromeBrush}">
        <ListBox x:Name="categoryListbox" Grid.Row="0" HorizontalAlignment="Stretch" SelectionChanged="categoryListbox_SelectionChanged"  >
            <ListBox.ItemTemplate>
                <DataTemplate>
                    <Grid x:Name="content" >
                        <Grid.RowDefinitions>
                            <RowDefinition Height="100"/>
                                <RowDefinition Height=""/>
                            </Grid.RowDefinitions>
                        <StackPanel Orientation="Horizontal" VerticalAlignment="Center" Margin="5,3,3,3">
                            <Image x:Name="img" Source="{Binding category_icon_link}" Tag="{Binding id}" Height="80" Width="80" Margin="3,0,5,0"/>
                            <TextBlock x:Name="categoryName" Text="{Binding category_name}" VerticalAlignment="Center"  FontSize="32"/>
                        </StackPanel>
                    </Grid>
                </DataTemplate>
            </ListBox.ItemTemplate>
            </ListBox>
    </Grid>