Is it dying
Can you identify this shrub in our porch and if the coloring means it is dying
It's just a common box, aka Buxus Sempervirens. Give it a trim and maybe repot it...can't tell how big the pot is but doesn't look particularly roomy.
To Plant a Garden is to Believe in Tomorrow
If the porch is enclosed, the box would probably be happier outside. It might be getting too hot if it's in a glass porch.
Don't trim too much off as you could spoil the shape. I would definitely move it outdoors and remove the stones as they will get hot and it will need a lot more watering. A bigger pot with some new compost would be good too. If you do want to top dress it you could use bark but I would be inclined not to bother.