I’m interested to know where you think the VNAV Top Of Descent point is for Penang if:
VNAV is available,
Cruise at FL340/294CAS,
Descent speed 268CAS,
Nil wind,
No STAR or approach loaded,
Distance from IGARI to Penang is 222NM.
I'm curious to see where you intend going with this. At a heavy weight of about 210 T, the descent point from FL340 would be about 130 NM from Penang.