If you convert from raw to JPEG, you loose most of the data available. That’s fine for display since a high quality JPEG is all a lot of output devices can handle. For editing white balance, or adjusting exposure, you want all the data available from the raw file, either as the raw file or as a TIFF or DNG. TIFF is the traditional 16 bit format. DNG is an Adobe format.
DPP should be able to deliver a change in exposure of a couple of stops either way before converting the file to a JPEG. ACR gives up to 4 stops of control but you may find excessive noise after a couple of stops depending on the image.