Phone them and confirm. It does however say: "Extra Low-Profile kit" and "low profile brackets bundled for fast setup!" and "- Low Profile Bracket Bundled: Yes ( 1 slots x 2 )"
So if you install the low profile bracket you will lose the VGA port. It's much better to go for the GT620 than the GT210 since the GT620 has a much newer HDMI port on it that has much more capabilities.
I did call and the sales person says it will not fit, but I went through quite a few guides on the net that say it does fit, but you need to remove the motherboard first, slot the card, then put everything back together.
I don't expect the sales guys to know every card and possible configuration.