Pretty sure that yeah it'll shift to the left, since
increase pressure -> increase concentration of all gases -> Le Chetalier's -> minimise change in concentration -> favour reverse reaction -> shift to left
i didn't say the concentration of a solid or liquid increases, i just said more of it is made.
because for a solid or liquid the concentration is fixed; a particular amount occupies a certain amount of space
for an aqueous substance or a gas, more particles of the substance can (usually) be put in the same amount of space - hence the concentration increases. But this doesn't hold for solids or liquids
In reality what this would look like is that you would be able to see the pile of carbon & water settled at the bottom of the container increase a little bit
The reaction shown here is the famous steam reformer reaction, in which carbon reduces water to carbon monoxide and elemental hydrogen. In actual fact, this reaction is carried out over a bed of red-hot charcoal at about 900 Celsius, and the water is introduced as steam.