Final answer:
The example of partially obfuscated data is '60-70 years old' since it provides a range rather than an exact age, thereby obscuring the specific data point.
Step-by-step explanation:
An example of partially obfuscated data among the options provided is A: 60-70 years old. This is because the exact age is not given, but rather a range that obscures the specific data point. On the other hand, option C, denoting an age of '65 years old', provides a clear and specific piece of information, and is therefore not considered obfuscated. Option B, 'Had a stroke', and option D, '94103' (which appears to be a zip code), are not related to obfuscation of data but rather to a specific event and a location identifier, respectively.