Попробуйте это
<Grid>
<Stackpanel Orientation = "Horizontal">
<TextBlock Margin="10,10,0,0" Foreground="White" FontWeight="Bold">Życia:</TextBlock>
<TextBlock Margin="50,10,0,0" Foreground="White" Text="{Binding Text, ElementName=points}"></TextBlock>
</Stackpanel>
</Grid>