Answer:
206°
I realise that I didn't do it the easiest way. :(
Explanation:
So first find angle XCY.
XCY = 180 - 72 - 26 = 82°
Then you can see that angle WCR is 154° because of vertical angles.
Arc RW is 154° too because WCR is a central angle.
Arc ZW is 26° because WCX is a central angle.
All we have to find now is angle ZCR.
You can see that ZCR and XCW are vertical angles.
ZCR = 26°
Arc ZR is also 26° because ZCR is a central angle.
154° + 26° + 26° = 206°