Yes, the point on the sensor is upside down and backward from where you see it on the image. I.e., when viewing the sensor from the front... look for the speck seen in the upper right corner of the image in the lower left corner of the sensor itself.
Have you followed up the wet cleaning with a bulb blower? There's also a product called "Speck Grabber" to help with stubborn, individual specks.
What f-stop is the test image above? And what camera? There will nearly always be some few, small specks of dust on your camera's sensor. If you shoot an f22 or smaller for the test shot, you'll see them. However, you shouldn't be using that small an aperture for regular shooting purposes (due to diffraction, Google for more info if interested). There's rarely reason to use smaller than about f11 on a crop sensor camera, at which there might be no sign of that dust speck at all. On a full frame camera, f16 is often the smallest aperture you need, and again a small speck might not show up.
Some cameras also have a Dust Delete feature. Run that occasionally and the camera takes a shot, analyzes it, mapping out any small dust specks it finds.
Be very careful with that cleaning fluid! If you get too much in there, it can seep around the sensor or into other areas of the camera where you don't want it!
