When looking at the PCC-M0840M Series of inductors from Panasonic the Dot on the top of the part is the “start of the winding mark” and is not calling out polarity.
Applicable Part Numbers
ETQ-P4M330KVK ETQ-P4M1R5KVK ETQ-P4MR68KVK ETQ-P4M1R0KVK ETQ-P4M3R3KVK ETQ-P4M2R2KVK ETQ-P4M4R7KVK ETQ-P4M220KVK ETQ-P4M6R8KVK ETQ-P4M100KVK ETQ-P4M150KVK