#point feature class
pointFc = r"pointfeatureclass"

#update table
tab = r"updatetable"

import arcpy

#create dictionary
di = {}

#iterate point feature class and store values
with arcpy.da.SearchCursor (pointFc, ["No", "x", "y"]) as curs:
    for no, x, y in curs:
        #store value
        di [no] = (x, y)

#update table
with arcpy.da.UpdateCursor (tab, ["No", "x", "y"]) as curs:
    for no, x, y in curs:
        #get value from dictionary
        x, y = di [no]
        row = (no, x, y)
        #update table
        curs.updateRow (row)